Quote: With a 6 inch refractor, is low power binoviewing worth the bother?
"You're not afraid of the dark, are you?" - Riddick "The best scientists are humble. They seek to understand, not to ensure their legacy, but merely to understand." - Mori
MarkLeica 8x20; Nikon Action 7x35; Vixen Apex Pro 8x42; Orion 15x63; Docter Nobilem 15x60WO Megrez II 80 FD / APM 107mm f/6.5 / Mewlon 210 on DM-6 + Berlebach Planet
Quote:Tammy, thanks very much for posting with your personal experience of this kind of setup. The picture really shows how extreme it makes things at the focuser end. Can I confirm that I've understood you correctly... You recommended 225-250mm backfocus but at the start of the post you said your refractor has 316mm of backfocus. Can I ask why you chose the larger amount? In the example picture you provided you are using only 230mm (though it looks like a bit more than that - perhaps I'm misjudging it, I guess the distance to the first lens in the eyepiece isn't as far as first impressions suggest).Would you mind saying a bit more about what's awkward about using it with all the extensions, without the binoviewer?
Quote:If you get the length of the tube right and you have a long drawtube you may not even need extensions. I have a 6" f8 with a FT3545 focuser with 4.5" drawtube, I can reach focus at 1X to 2.6X in my binos, and comfortably reach focus with all my eyepieces, without the need for any extensions. At 1X binoviewing I have 1/2" of backfocus left, and at 2.6X I have the drawtube extended and 1/2" remaining. It is definitely worth it to figure this out if you can go with a FT3545.